How do I make a button that will go to the next menu?

I'm new to Encore DVD, watched the Lynda.com training video and am doing pretty well so far. I'm having trouble figuring out how to have a simple arrow graphic (from the library) be the button that goes to another submenu. Can someone tell me how to do this?

I got it, thanks! I also discovered something else too. If I want to use highlight group 2 for that specific button, I could only change it to (=2) IN photoshop. couldn't figure out how to change it in Encore. In other words, if all of my chapter selection subpictures are yellow when selected, I wanted the button for the next menu to be dark red when in normal state, and brighter red when selected. The only way I could do it was to go in photoshop and change the (=1) to (=2).

Which leads me to ask what the "Highlight:" option is in the properties panel? Its options are Group 1 and Group 2